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利用一次方程组可解决许多联系实际的中考题,请看下面几例. 一、储蓄问题例1 李明以两种形式分别储蓄了2000元和1000元,一年后全部取出,扣除利息所得税后可得利息43.92元,已知这两种储蓄年利率的和为3.24％,问这两种储蓄的年利率各是百分之几?(注:公民应交利息所得税=利息金额×20％) (2000年广西中考题) 解:设储蓄2000元和1000元的年利率分别为x％
The use of a system of equations can solve many problems in the actual examination. Please refer to the following examples. I. Savings Example 1 Li Ming saved 2,000 yuan and 1,000 yuan in two forms respectively. After one year, he took it out and deducted the interest income tax. The available interest is RMB 43.92. It is known that the sum of the two annual savings rates is 3.24%. What is the annual interest rate of these two types of savings? (Note: Citizens should pay interest income tax = interest amount × 20%) (2000 Guangxi exam) Solution: Let the annual interest rate of savings of 2,000 yuan and 1,000 yuan be x% respectively.